The international chemical weapons watchdog says all the precursor chemicals for sarin gas removed from Syria have now been destroyed.

Guinea declares a national health emergency as it battles to curb the spread of the deadly Ebola virus that has killed more than 1,000 people.

A battery tattoo powered by perspiration has been unveiled by chemists in California.

A week after arriving at Comet 67P/Churyumov-Gerasimenko, Europe's Rosetta probe is busy acquiring the information needed to select a landing site.

Scientists may have identified the first known dust particles from outside our Solar System, in samples returned to Earth by a Nasa space mission.